The Onset HOBO UX90-002 Standard Light On/Off Data Logger monitors indoor light changes with an internal sensor and records light on and off conditions, making it ideal for building energy audits and light usage analysis. The HOBO UX90-002 Light On/Off Data Logger offers 128 KB memory, capable of 84,650 measurements; the UX90-002M model offers an expanded 512 KB memory, capable of over 346,795 measurements.
Note: UX90-002 data loggers require the HOBOware software (free to download) to operate. Please also note that a USB interface cable comes with the purchase of a HOBOware Pro CD (BHW-PRO-CD), only.